sys/arch/usermode/include/intr.h

   1 /* $NetBSD: intr.h,v 1.1 2007/12/29 14:38:33 jmcneill Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef _ARCH_USERMODE_INCLUDE_INTR_H
  30 #define _ARCH_USERMODE_INCLUDE_INTR_H
  31
  32 #include <machine/intrdefs.h>
  33
  34 __inline static int
  35 splraise(int x)
  36 {
  37         extern int usermode_x;
  38         int oldx = usermode_x;
  39
  40         usermode_x = x;
  41
  42         return oldx;
  43 }
  44
  45 __inline static void
  46 spllower(int x)
  47 {
  48         extern int usermode_x;
  49
  50         usermode_x = x;
  51 }
  52
  53 #define spl0()          spllower(IPL_NONE)
  54 #define splx(x)         spllower(x)
  55
  56 typedef uint8_t ipl_t;
  57 typedef struct {
  58         ipl_t _ipl;
  59 } ipl_cookie_t;
  60
  61 static inline ipl_cookie_t
  62 makeiplcookie(ipl_t ipl)
  63 {
  64         return (ipl_cookie_t){._ipl = ipl};
  65 }
  66
  67 static inline int
  68 splraiseipl(ipl_cookie_t icookie)
  69 {
  70         return splraise(icookie._ipl);
  71 }
  72
  73 #include <sys/spl.h>
  74
  75 #endif /* !_ARCH_USERMODE_INCLUDE_INTR_H */